Swing示例 - 新增邊框到JLabel

以下示例展示瞭如何在Java Swing應用程式中給JLabel新增邊框。

我們使用以下API。

• BorderFactory.createLineBorder() - 建立線邊框。

• JLabel.setBorder(border) - 給JLabel設定所需的邊框。

示例

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.LayoutManager;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.Border;

public class SwingTester {
   public static void main(String[] args) {
      createWindow();
   }

   private static void createWindow() {    
      JFrame frame = new JFrame("Swing Tester");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      createUI(frame);
      frame.setSize(560, 200);      
      frame.setLocationRelativeTo(null);  
      frame.setVisible(true);
   }

   private static void createUI(JFrame frame){
      //Create a border
      Border blackline = BorderFactory.createLineBorder(Color.black);
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();  
      panel.setLayout(layout);       
      JPanel panel1 = new JPanel();
      String spaces = "                   ";
      JLabel label = new JLabel(spaces + "Border to JLabel" + spaces);
      label.setBorder(blackline);
      panel1.add(label);  
      panel1.add( new JLabel(spaces + "JLabel with no border" + spaces));  
      panel.add(panel1);
      frame.getContentPane().add(panel, BorderLayout.CENTER);    
   }
}

輸出